I got my ass handed to me last night on the small Conquest server. I can't tell if it was a direct result of the high tick rate, just an off day, or if the kids watching Netflix had an impact. I suspect it might have been a combination of the tick rate and Netflix. I've been meaning to upgrade my Internet, so I don't have a ton of bandwidth to begin with. I'm guessing there might've been a bottleneck with gaming + streaming. However, one thing I didn't notice was the one shot kills from regular guns. I certainly lost most of my head-to-head gunfights, but it never felt like someone one-shotted me with a pistol or something. That always annoyed the crap out of me.
Overall, if the server can handle it, the high tick rate seems like the better option. Most of the people I saw talking about it in chat either felt a difference or didn't. I don't recall anyone saying it was worse. Hopefully the servers continue to perform well, and I think there's a big patch coming soon which could really make things awesome.